Based on the creature as she appears in Curseworld, Part II. Would include Ronin (identical to 70735 Ronin R.E.X. but with hairpiece included), Garmadon (identical to 70750 Ninja DB X), and various Ninja and Ghosts; Possession's characters were fairly well distributed so I don't have any particulars in mind.
Nya's Elemental Dragon
Appeared briefly in the series; mostly I think it's just about time Nya got her own dragon set as opposed to the Fusion Dragon. Would come with Ninja Nya (obviously) and an appropriate villain minifig or two.
Almost as sad as Nya's total lack of dragon is the couple of dragons Cole and Kai got back in the Skybound wave. I get that not every dragon can be huge and impressive, but these were downright sad. You'd think they could have at least done something like 70748 Titanium Dragon.
Price: $20+ each; seems to be the minimum to get a halfway decent dragon build.
This one is actually more about the Dragon, and the fact that Zane hasn't gotten a full-sized dragon in four years-nor does he look to be getting one this year, as 70678 Castle of the Forsaken Emperor's dragon belongs to the set's titular character. The polybag figure is a neat little dragon, but our favorite ice Ninja could use better. Would include Zane, obviously, maybe Arkade, Skullbreaker, or some show-exclusive dragon hunters and/or Hunted Skylor. Wouldn't say no to a Dragon Hunter vehicle build either.
And a DC CMF with 22 minifigs with their DC Super Villains designs:
1. The Ventriloquist with Scarface
3. Klarion with Teekl
4. Harvey Bullock
13. Johnny Quick
15. Sea King
17. Power Ring
21. Billy Batson
22. Condiment King